[PATCH] xfrm: use "unsigned int" in __xfrm6_pref_hash()

[Alexey Dobriyan]

x86_64 is zero-extending arch so "unsigned int" is preferred over "int"
for address calculations.

Space savings:

        add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-58 (-58)
        function                                     old     new   delta
        xfrm_hash_resize                            2752    2743      -9
        policy_hash_bysel                            985     973     -12
        policy_hash_direct                          1036     999     -37

Signed-off-by: Alexey Dobriyan <adobri...@gmail.com>
---

 net/xfrm/xfrm_hash.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/xfrm/xfrm_hash.h
+++ b/net/xfrm/xfrm_hash.h
@@ -54,8 +54,8 @@ static inline unsigned int __xfrm4_dpref_spref_hash(const 
xfrm_address_t *daddr,
 static inline unsigned int __xfrm6_pref_hash(const xfrm_address_t *addr,
                                             __u8 prefixlen)
 {
-       int pdw;
-       int pbi;
+       unsigned int pdw;
+       unsigned int pbi;
        u32 initval = 0;
 
        pdw = prefixlen >> 5;     /* num of whole u32 in prefix */